<template>
  <div :class="[
    'login-wrapper',
    ['', 'login-form-right', 'login-form-left'][direction]
  ]">
    <el-form ref="form" size="large" :model="form" :rules="rules" class="login-form ele-bg-white"
      @keyup.enter.native="submit">
      <h4>{{ $t('login.title') }}</h4>
      <el-form-item prop="admin">
        <el-input clearable v-model="form.admin" prefix-icon="el-icon-user" :placeholder="$t('login.username')" />
      </el-form-item>
      <el-form-item prop="password">
        <el-input show-password v-model="form.password" prefix-icon="el-icon-lock"
          :placeholder="$t('login.password')" />
      </el-form-item>
      <!-- <el-form-item prop="code">
        <div class="login-input-group">
          <el-input clearable v-model="form.code" prefix-icon="el-icon-_vercode" :placeholder="$t('login.code')" />
          <img alt="" v-if="captcha" :src="captcha" class="login-captcha" @click="changeCaptcha" />
        </div>
      </el-form-item> -->
      <div class="el-form-item">
        <el-checkbox v-model="form.remember">
          {{ $t('login.remember') }}
        </el-checkbox>
        <!-- <el-link type="primary" :underline="false" class="ele-pull-right" @click="$router.push('/forget')">
          忘记密码
        </el-link> -->
      </div>
      <div class="el-form-item">
        <el-button size="large" type="primary" class="login-btn" :loading="loading" @click="submit">
          {{ loading ? $t('login.loading') : $t('login.login') }}
        </el-button>
      </div>
      <!-- <div class="ele-text-center" style="margin-bottom: 10px">
        <i class="login-oauth-icon el-icon-_qq" style="background: #3492ed"></i>
        <i class="login-oauth-icon el-icon-_wechat" style="background: #4daf29"></i>
        <i class="login-oauth-icon el-icon-_weibo" style="background: #cf1900"></i>
      </div> -->
    </el-form>
    <div class="login-copyright">
      copyright © 2022 eleadmin.com all rights reserved.
    </div>
    <!-- 多语言切换 -->
    <div style="position: absolute; right: 30px; top: 20px">
      <i18n-icon :icon-style="{ fontSize: '22px', color: '#fff', cursor: 'pointer' }" />
    </div>
    <!-- 实际项目去掉这段 -->
    <!-- <div class="hidden-xs-only" style="position: absolute; right: 30px; bottom: 20px; z-index: 9">
      <el-radio-group v-model="direction" size="mini">
        <el-radio-button label="2">居左</el-radio-button>
        <el-radio-button label="0">居中</el-radio-button>
        <el-radio-button label="1">居右</el-radio-button>
      </el-radio-group>
    </div> -->
  </div>
</template>

<script>
import I18nIcon from '@/layout/components/i18n-icon.vue';
import { getToken } from '@/utils/token-util';
import { login, getCaptcha } from '@/api/login';

export default {
  // eslint-disable-next-line vue/multi-word-component-names
  name: 'Login',
  components: { I18nIcon },
  data() {
    return {
      // 登录框方向, 0居中, 1居右, 2居左
      direction: 0,
      // 加载状态
      loading: false,
      // 表单数据
      form: {
        admin: 'admin',
        password: '123456',
        // remember: true,
        // code: ''
      },
      // 验证码base64数据
      captcha: '',
      // 验证码内容, 实际项目去掉
      text: ''
    };
  },
  computed: {
    // 表单验证规则
    rules() {
      return {
        admin: [
          {
            required: true,
            message: this.$t('login.username'),
            type: 'string',
            trigger: 'blur'
          }
        ],
        password: [
          {
            required: true,
            message: this.$t('login.password'),
            type: 'string',
            trigger: 'blur'
          }
        ]
      };
    }
  },
  created() {
    if (getToken()) {
      this.goHome();
    } else {
      // this.changeCaptcha();
    }
  },
  methods: {
    /* 提交 */
    submit() {
      this.$refs.form.validate((valid) => {
        if (!valid) {
          return false;
        }
        // if (this.form.code.toLowerCase() !== this.text) {
        //   this.$message.error('验证码错误');
        //   return;
        // }
        this.loading = true;
        login(this.form)
          .then((msg) => {
            this.loading = false;
            this.$message.success(msg);
            this.goHome();
          })
          .catch((e) => {
            this.loading = false;
            this.$message.error(e.message);
          });
      });
    },
    /* 跳转到首页 */
    goHome() {
      // console.log('跳转到首页');
      this.$router.push(this.$route?.query?.from ?? '/').catch(() => { });
    },
    /* 更换图形验证码 */
    changeCaptcha() {
      // 这里演示的验证码是后端返回base64格式的形式, 如果后端地址直接是图片请参考忘记密码页面
      getCaptcha()
        .then((data) => {
          this.captcha = data.base64;
          // 实际项目后端一般会返回验证码的key而不是直接返回验证码的内容, 登录用key去验证, 可以根据自己后端接口修改
          this.text = data.text;
          // 自动回填验证码, 实际项目去掉这个
          this.form.code = this.text;
          this.$refs?.form?.clearValidate();
        })
        .catch((e) => {
          this.$message.error(e.message);
        });
    }
  }
};
</script>

<style lang="scss" scoped>
/* 背景 */
.login-wrapper {
  padding: 50px 20px;
  position: relative;
  box-sizing: border-box;
  background-image: url('@/assets/bg-login.jpg');
  background-repeat: no-repeat;
  background-size: cover;
  min-height: 100vh;

  &:before {
    content: '';
    background-color: rgba(0, 0, 0, 0.2);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
  }
}

/* 卡片 */
.login-form {
  margin: 0 auto;
  width: 360px;
  max-width: 100%;
  padding: 25px 30px;
  position: relative;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
  box-sizing: border-box;
  border-radius: 4px;
  z-index: 2;

  h4 {
    text-align: center;
    margin: 0 0 25px 0;
  }

  &>.el-form-item {
    margin-bottom: 25px;
  }
}

.login-form-right .login-form {
  margin: 0 15% 0 auto;
}

.login-form-left .login-form {
  margin: 0 auto 0 15%;
}

/* 验证码 */
.login-input-group {
  display: flex;
  align-items: center;

  :deep(.el-input) {
    flex: 1;
  }
}

.login-captcha {
  height: 38px;
  width: 102px;
  margin-left: 10px;
  border-radius: 4px;
  border: 1px solid #dcdfe6;
  text-align: center;
  cursor: pointer;

  &:hover {
    opacity: 0.75;
  }
}

.login-btn {
  display: block;
  width: 100%;
}

/* 第三方登录图标 */
.login-oauth-icon {
  color: #fff;
  padding: 5px;
  margin: 0 10px;
  font-size: 18px;
  border-radius: 50%;
  cursor: pointer;
}

/* 底部版权 */
.login-copyright {
  color: #eee;
  padding-top: 20px;
  text-align: center;
  position: relative;
  z-index: 1;
}

/* 响应式 */
@media screen and (min-height: 550px) {
  .login-form {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: -220px;
  }

  .login-form-right .login-form,
  .login-form-left .login-form {
    left: auto;
    right: 15%;
    transform: translateX(0);
    margin: -220px auto auto auto;
  }

  .login-form-left .login-form {
    right: auto;
    left: 15%;
  }

  .login-copyright {
    position: absolute;
    bottom: 20px;
    right: 0;
    left: 0;
  }
}

@media screen and (max-width: 768px) {

  .login-form-right .login-form,
  .login-form-left .login-form {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    margin-right: auto;
  }
}
</style>
